Hey, I'm new here. I have a 29 gallon community tank that I've had sucess with for about 8 months now. Recently I bought a 75 gallon tank that I have yet to set up becuase I haven't fully decided what I want to put in it. I would like to do elephant nose fish (if I can find them around here), and I thought maybe black ghost knife fish with them. Is that even possible is my question, if so, how many of each? Thanks for the help.